LOL, weird combination. Thoughts?
04-12-2009, 09:13 PM
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LOL, weird combination. Thoughts? Ok, here's the deal. Trying to come up with something a little different, as if being carb'd and in a circle track car wasn't different enough.
Iron 5.3 block bored to standard 5.7 size.
Stock 5.3 crank offset ground (more stroke) and reduced to Honda size rod journal.
Eagle H-beam 6.250 length Honda-journal rods.
Probe forged flat-top pistons (not custom, but a book p/n that works with the offset ground crank and long rods).
Factory 5.3 heads with the chambers welded up and recontoured to get the cc's hopefully in the upper 40's without a lot of deck milling, valves opened up to a 2.05/1.55 size, then ported runners for more flow.
Solid roller valvetrain, cam in the 250's/260's at .050, lift in the .600's.
Distributor conversion front cover, MSD billet distributor.
Victor Jr. intake (maybe Super Vic), tapered spacer, 850 carb on alcohol.
1 3/4 to 1 7/8 step headers.
That's pretty much the guts of it, should come out right at 355ci. I work at a machine shop so all the labor work is on the house. Really this is just kind of an R&D project, been wanting to do one of these for a while, if it does grenade all we'll really be out is some nice rods and pistons, the block, crank and heads are still production pieces. It will be going in my IMCA/USMTS style modified on dirt, car is only 2500lbs after race w/ me in it. We're looking for hopefully 550-575hp at the crank, about 500-ish ft-lb torque. Think we can get there with this little Frankenstein? Opinions are welcome.
Iron 5.3 block bored to standard 5.7 size.
Stock 5.3 crank offset ground (more stroke) and reduced to Honda size rod journal.
Eagle H-beam 6.250 length Honda-journal rods.
Probe forged flat-top pistons (not custom, but a book p/n that works with the offset ground crank and long rods).
Factory 5.3 heads with the chambers welded up and recontoured to get the cc's hopefully in the upper 40's without a lot of deck milling, valves opened up to a 2.05/1.55 size, then ported runners for more flow.
Solid roller valvetrain, cam in the 250's/260's at .050, lift in the .600's.
Distributor conversion front cover, MSD billet distributor.
Victor Jr. intake (maybe Super Vic), tapered spacer, 850 carb on alcohol.
1 3/4 to 1 7/8 step headers.
That's pretty much the guts of it, should come out right at 355ci. I work at a machine shop so all the labor work is on the house. Really this is just kind of an R&D project, been wanting to do one of these for a while, if it does grenade all we'll really be out is some nice rods and pistons, the block, crank and heads are still production pieces. It will be going in my IMCA/USMTS style modified on dirt, car is only 2500lbs after race w/ me in it. We're looking for hopefully 550-575hp at the crank, about 500-ish ft-lb torque. Think we can get there with this little Frankenstein? Opinions are welcome.
